A class of students mated fruit flies to study the inheritance of traits. The crosses and their results are described below. Cross 1: A female fruit fly with red eyes mates with a male fruit fly with brown eyes producing 63 offspring. All 63 offspring in this first generation have red eyes.   Cross 3: A female fruit fly with black and tan striped body color mates with a male with black body color. In this first generation, al 56 offspring have black and tan striped body color.       Cross 2: A red-eyed male and a red- eyed female from the first-generation mate to produce a second generation of flies. Out of the 98 offspring produced, 74 have red eyes and 24 have brown eyes.   Cross 4: A black and tan striped male and a black and tan striped female from the first-generation mate to produce a second generation of flies. Out of the 103 offspring, 76 have black and tan striped body color and 27 have black body color.       How do meiosis and gene expression explain the results from Crosses 1 and 2 OR from Crosses 3 and 4? Use evidence from the crosses to support your answer. You may include a diagram to support your answer. If you choose to include a diagram, you will be prompted to upload it on the next page

The image shows a pair of homologous chromosomes from a single parent before gamete production. M1 and M2 are maternal chromosomes, while P1 and P2 are paternal chromosomes. Two traits are shown: D represents seed color (D – green, d – yellow), while F represents flower color (F – purple, f – white). These two traits follow the patterns of basic Mendelian genetics. During crossing-over between the M2 F allele and the P1 f allele, a mutation occurred and the portion of P1 did not reattach to the chromosome. Which of the following explains what would happen to the proportion of white flowers in a population resulting from this mutation? A - There would be an increase in the proportion of white flowers because the f allele is distributed to more gametes. B - There would be a decrease in the proportion of white flowers because the f allele is not distributed to as many gametes. C - There would be an increase in the proportion of white flowers because the f allele would not be masked by the…

In a bird, codominance is seen in feather color. If a red bird is mated with red and white, what is the probability of having a red and white bird? Show the cross.

You are conducting independent research for your Honors Thesis in a Drosophila research lab.  One of the graduate student researchers has provided you with two mutant strains of Drosophila.  One has scarlet eyes, and the other has brown eyes.  You cross homozygous scarlet-eyed male Drosophila with female flies homozygous for the brown-eye color allele, and all of the male and female F1 flies have wild-type eyes.  Crosses involving F1 males x F1 females yield the results shown below. You know the traits involved are autosomal, and that reciprocal parental crosses produce similar results.   a) What is the phenotypic ration observed among the offspring in the F2 generation? b) How many pairs of genes are involved in determining these traits? Please explain. c) Please EXPLAIN the genetic basis for the pattern of inheritance illustrated in this cross. Be sure to mention the alleles involved.